The city of Chicago fired an investigator because he refused to falsify police brutality complaints to make officers appear innocent of any wrongdoing, further raising suspicions that the Chicago Police Department (CPD) is a corrupt police force.

Investigator and former police commander Lorenzo Davis, 65, was released from the Independent Police Review Authority (IPRA) after refusing to alter case findings indicating several instances of unjustified use of police force. The IPRA announced Davis’ termination on July 9, and accused him of having “a clear bias against the police.”

The IPRA also said that Davis was “the only supervisor at IPRA who resists making requested changes as directed by management in order to reflect the correct finding with respect to OIS.” Considering the CPD’s past of heinous corruption, it’s reasonable to believe that Davis was ousted because he didn’t cover up the behavior of dirty cops.

The Chicago PD has earned a notorious reputation for corruption and racism that has existed for decades. Even the highest-ranking police officials in Chicago are suspected of being corrupt. “I did not like the direction the police department had taken,” said Davis. “It appeared that officers were doing whatever they wanted to do.”